a jar contains blue,red,and green marbles.The ratio of blue:green:=3:5:4.What is the possibility that a marble choose at ransom is not red
5 of the 12 marbles are red
so, 7 are not red.
what do you think?
ratios
To find the probability that a randomly chosen marble is not red, we first need to determine the total number of marbles in the jar.
Let's use the given ratio of blue:green = 3:5:4 to find the proportion of each color.
Since the ratio consists of 3, 5, and 4 parts, we can divide the total number of parts into 12 equal parts (3 + 5 + 4 = 12).
So, for every 12 marbles, there are 3 blue marbles, 5 green marbles, and 4 red marbles.
Now, to calculate the probability of choosing a marble that is not red, we need to add the number of blue and green marbles together.
The total number of non-red marbles is 3 (blue) + 5 (green) = 8
Therefore, the probability of choosing a marble that is not red is 8/12, which simplifies to 2/3 or approximately 0.67.
So, the probability that a randomly chosen marble is not red is 2/3 or 0.67.